減輕Domino電路電荷分享之雙重路徑架構設計

A Dual-Path Structure for Alleviating Charge Sharing in CMOS Domino Circuits

黃伯寬(Bo-Kuan Huang) ； 邱威豪(Wei-Hao Chiu) ； 林浩仁(How-Rern Lin)

《科學與工程技術期刊》 1卷3期 (2005/12) Pp. 37-45

https://doi.org/10.7117/JSET.200512.0037

摘要

在動態邏輯電路的設計中，電荷分享(charge sharing)是一個嚴重的潛在問題，將致使動態節點的電壓落降(voltage drop)，嚴重時甚至造成電路錯誤。在這個議題上，分離路徑骨牌電路(split-path domino)被提出用來解決電荷分享的問題，透過分離路徑骨牌的特殊結構，電荷分享的問題獲得了改善；然而，分離路徑骨牌擁有較高的電路複雜度，電路設計較為困難。本篇論文提出雙重路徑骨牌(dual-path domino)的新設計方案，以簡潔的電路結構，即可有效的降低電路電荷分享的問題。根據實驗結果，本篇論文所提出的雙重路徑骨牌電路設計方案，在維持相同的電路速度與電荷分享的改善前提下，可以比分離路徑骨牌電路減少50%以上的電路複雜度，並且對於電荷分享、電路速度與電路耗能，都有非常顯著的改善。

關鍵字

電荷分享 ； 電壓落降 ； domino動態電路

並列摘要

Charge sharing is one of the critical issues in designing domino circuits. It causes a voltage drop on the dynamic node which may induce a malfunction in the circuit. The split-path domino has been proposed to deal with charge sharing in domino circuits; however, it suffers from a complex circuit structure. In this study, a novel circuit structure, the dual-path domino, which has a concise constitution and is more effective in dealing with the charge sharing issue, is proposed. By the experimental results, the dual-path domino reduces the circuit complexity by more than 50% compared to the split-path domino. Moreover, the dual-path domino obviously achieves effectiveness in reducing dropped voltage due to charge sharing, maintaining circuit performance, and reducing power consumption.

並列關鍵字

charge sharing ； voltage drop ； domino